In Shabbat 63a it says:
"On the topic of Jerusalem, Raḥava said that Rabbi Yehuda said: The logs of Jerusalem used for fuel were from the cinnamon tree, and when they would ignite them, their fragrance would waft through all of Eretz Yisrael. And since Jerusalem was destroyed, these fragrant logs were buried, and only a sliver the size of a grain of barley remains, and it is located in the treasury of [gazzai] Tzimtzemai the queen (צמצמאי מלכתא)."
In this answer I brought the opinion of the Maharatz Chajes that the name Tzimtzemai is the result of a scribal error and the original name was Zenobia, who was the queen of Palmyra (Tadmor) in the 3rd century CE. In the same source brought in that answer, his grandson Rabbi Tzvi Peretz Chajes made a good argument against this view. So is there another explanation for who she was?